Effects of Envelope Orography and Gravity Wave Drag Parameterization on Regional Climate Simulations
包络地形和重力波拖曳对区域气候模拟效果的影响

The regional climate model (RegCM2) of NCAR is used to study the effects of envelope orography and gravity wave drag on the regional climate in China during May and June of 1991. Analysis and comparison of the model results show that the introducing of gravity wave drag to the model can improve the model performance to some extent and result in more realistic simulation, and the effect of envelope orography on regional climate simulation is less significant than that of gravity wave drag. The results also show that both gravity wave drag and envelope orography have smaller influence on model results in the beginning of simulation, but greater in the later stage.